Abstract: The soil microbial number, biomass,respiratory rate,the plant biomass on the ground and so on, 14 environmental factors were initialy investigated,systematically analysed soil microbial distribution by mathematics method of interrelated analysis and blurred analysis. The result indicated:the soil microbial number,biomass and respiratory rate of 8 communities display the different ecological distribution feature,the feature relates to the 14 different environmental factors in 8 communities.In the course of comparable analysis on soil microbial distribution.The synthesize patterns of the microbial number,biomass and respiration in Chloris virgata community soil and weed community soil is best similar to that of Leymus chinensis community. Puccinellia tenuiflora community and Sueda glauca community are little similar to that of L.chinensis.Cleistogenes squarossa community, Clamagrostis eqigeios community and Phragmites communis community are middingly similar to that of L.Chinensis community.

Key words: Grassland of northeastern China, Ecosystem, Soil microbe, Blurred analysis

摘要： 对东北草原8种植物群落的土壤微生物数量、生物量、呼吸速率,地上生物量等1种环境因素进行初步调查,利用相关分析和模糊分析的方法对土壤微生物的分布进行了比较系统地研究.结果表明,8种群落的土壤微生物数量、生物量和呼吸速率表现出不同的生态分布特点,该特点与8种群落的1种环境因素存在着一定差异有关.从土壤微生物数量、生物量和呼吸速率的空间变化比较,虎尾草和杂草群落与羊草群落的土壤微生物数量、生物量和呼吸速率综合水平最相似,碱茅和碱蓬群落的相似程度最小,隐子草、拂子茅和芦苇群落的相似程度居中.

关键词: 东北草原, 生态系统, 土壤微生物, 模糊分析